Campbell has been charged with three counts of aggravated battery with a deadly weapon.

Chandler will decide whether to proceed with those or charges.

The investigation is ongoing.

"Once the facts are turned over to me, we will decide if additional charges will be filed or not,” said Chandler.

Chandler said the suspect in this case is clear -- now, the focus in juvenile court will mostly be “why.”

The time Campbell could face in a state facility varies on a number of factors: competency, charges and ordered evaluations once in state care.

Chandler said whatever happens, the juvenile system isn’t about incarceration, it’s about rehabilitation. If guilty, kids go to treatment facilities run by the Children, Youth and Families Department.

“But as a child prosecutor you are putting that child -- if they did what they're accused of -- put that child in a facility or setting, because when they're released you want them to succeed and you want the community to be safe,” said Chandler.

Chandler is leaving his district attorney post, but he will still prosecute this case.

THE SPECIAL PROSECUTOR IN THE ROSWELL MIDDLE SCHOOL SHOOTING TALKS TO US, ON CAMERA. IT'S HIS FIRST SUCH INTERVIEW... AND HE TELLS KOAT ACTION 7 NEWS ANCHOR ROYALE DA WHAT LIES AHEAD FOR THE 12-YEAR OLD SUSPECT, MASON CAMPBELL. IT'S NEW AT SIX. 12-YEAR OLD MASON CAMPBELL IS IN A PSYCHIATRIC FACILITY IN ALBUQUERQUE. A JUDGE ORDERED HIM EVALUATED, A PROCESS THAT MUST BE FINISHED IN 60 DAYS. MATT CHANDLER IS THE 9TH JUDICIAL DISTRICT ATTORNEY AND SPECIAL PROSECUTOR IN THIS CASE. Chandler: "If there's a competency issue, the court will have to deal with that, if not then we will proceed relatively quickly." RIGHT NOW, CAMPBELL IS CHARGED WITH THREE COUNTS OF AGGRAVATED BATTERY WITH A DEADLY WEAPON. CHANDLER WILL DECIDE IF THOSE CHARGES WILL STICK. THE INVESTIGATION IS STILL HAPPENING. Chandler: "Once the facts are turned over to me we will decided if additional charges will be filed or not." Royale Da/KOAT: "Chandler says the suspect in this case is clear, now the focus in juvenile court will mostly be why." Campbell: "The allegations are strong and this Isn't one of those cases of who did it, it's more like why did he do it." THE TIME CAMPBELL FACES VARIES ON A NUMBER OF FACTORS: COMPETENCY, CHARGES AND ORDERED EVALUATIONS ONCE IN STATE CARE. CHANDLER SAYS WHATEVER HAPPENS... THE JUVENILE SYSTEM ISN'T ABOUT INCARCERATION, IT'S ABOUT REHABILITATION. IF GUILTY, KIDS GO TO TREATMENT FACILITIES RUN BY C-Y-F-D. but as a child prosecutor you are putting that child - if they did what they're accused of - put that child in a facility or setting, because when they're released you want them to succeed and you want the community to be safe." IN CLOVIS, ROYALE DA, KOAT, ACTION 7 NEWS. CHANDLER ANNOUNCED HE'S LEAVING HIS DISTRICT ATTORNEY POST.. BUT SAYS THAT DOESN'T IMPACT THIS CASE. HE'LL STILL BE PROSECUTING THE CASE. A STATE POLICE LIEUTENANT

The Obama administration will unveil a major climate change plan Monday aimed at a large reduction in greenhouse gas emissions from the nation's coal-burning power plants, a senior administration official told CNN.